Its not ROK but Sangrur (if for LDH-NDLS) & nearby location!!
Further, PNP isnt stoppage for PNP-NDLS but PNP-KLKA/UMB-PNP, PNP-ASR/LDH-PNP etc!! Same way, ROK-LDH-ROK dont have any day travel option & this train fills the same!!
There exist simply no service vs service & this train exist as filling option for no service route!!
This way, DEE-SGNR AC Exp runs via longer route (Sangrur),...
more... to fill the gap of operation in Dhauladhar Exp along with SAG connectivity with NDLS!!
PS: Opening thread discussed via UMB-CDG (already coupled with lots Shatabdi/Janshatabdi/Mail/Exp) & will not enhance run-time. Further, i replied to UMB Raj/Shatabdi/GR count & logically, LDH Shatabdi isnt been required & this has lead to its extension to MOGA!!